Moon of Saturn
Diameter: 1128 km
Distance: 377396 km (mean)
Period: 2.7369 days
Eccentricity: 0.002
Inclination: 0.019°
Magnitude: 10.4

Nearly circular shaped Dione was discovered by astronomer Cassini back in 1682. It is more massive than all known moons smaller than itself combined, the third densest of Saturn's moons and largely composed of water ice. Its surface is cratered alongside ice cliffs and varied terrain.